Improvement in wood-scraping machines



UNITEDA STATES PATENT Qur-ion ERASTUS S. FRENCH, OF TEMPLETON, MASSACHUSETTS, ASSlG-NOR TO JOSHUA El. PARTRIDGE, OF SAME PLACE.

IMPROVEMENT IN WOOD-SCRAPlNG MACHINES.

Specification forming part of Let-ters Patent No. 58,722,

To all whom it may concern:

Be it known that I, ERAsTUs S. FRENCH, of Templeton, in the county of Vorcester and State of Massachusetts, have invented a new and useful or Improved Machine for Scrapiiig Chair-Stuff or parts of chairs or various other wooden articles, and I do hereby declare tne saine to be fully described in the following specification, and represented in the accompanying drawings, of which- Figure l is a top view, Fig. 2 a side elevation, Fig. 8 a longitudinal section, and Fig 4. a transverse section, of it. Fig. 5 is an under-side view of its reciprocating driver.

This machine is calculated to simultaneously scrape the two opposite surfaces of a piece of wood during one forward movement of such piece.

In the drawings, A denotes the frame of the machine. At or near the front end of the said frame is a stationary platform, I3, which is arranged in advance of a scraper stock or carrier, G, which is extended across the frame at its upper part. a chip throat, b, in which such scraper is placed. In rear of sncli scraper-stock (l, and against it, is a bar, D, which also goes horizontally across the machine and serves to support one end of a fiat board or guide, E, which, near its other end, rests on and is fastened to the upper or rear girt, c, of the frame A. Over the scraper-stock C is another such stock, F, which carries a scraper, D', and rests on the heads of two adjusting-screws, c c, which screw into the stock C, and are arranged as represented.

The stock F is movable vertically between standards or uprightsfffj", and to preventit from being moved out of parallelism with the other stock, two vertical guides may be applied to the inner face of each of the standards, such guides being to enter corresponding recesses g g g g made in the stock, the same being as shown in Fig. 6, which is a horizontal section. of the upper scraper-stock and the npri'ghts. Each pair of such uprights is capped by a cross-bar, l, goin g from one to the other of them, and being fastened to them by screws. India-rubber springs lc 7c are arranged underneath the said bars z' i and on the scraper` stock, such springs being provided with cap- It contains a scraper, c, and l dated October 9, 1866.

plates l l, against which screws m m, screwed through the bars c' li, act, they heilig' for the purpose of varying the pressure of the springs on the scraper-stock, as occasion may require.

There is placed upon, and so as to extend transversely around, the guide E what may be termed the reciprocating driver77 G. It has an elastic cord or spring, H, fixed toit for retractin g it. A weight suspended from a cord going over a pulley and being attached to the driver may be employed as a substitute for the spring. The driver slides freely on the guide E and is advanced thereon by means of a mechanism which may thus be described: A rope or chain, k1, fastened to the driver, extends along to and about a guidepulley, l', fixed at t-he front end of the frame A. Such rope or chain is fastened to the circumference of a rotary drum, I, which revolves freely on a shaft, K, provided with a clutchwheel, L, by which the drinn may be brought into en ga gement with the shaft.

A lever or shipper, m2, whose fnlcru in is at or near its front end, has a stud, m3, extending from it into a groove, n, made in the periphery of one head of the drum. The said shipper is connected with a horizontal lever, N, bya pitman or rod, O, such lever N being arranged as represented, and having a stop, o, extend ing upward from it near its rear end. This stop, by contact with the frame when the lever is borne inward, serves to arrestthe lever when the drum is in proper engagement with the shaft. The rear end of the shipper is eamsliaped, and there is a cam, p, on the lower part of the driver. (See Fig. 5.)

A driving-pulley, k3, is fixed on the shaft K, and is for the purpose of putting such shaft in revolution by means of a belt from some proper motor.

The operation of the machine may be thus explained: A piece of board or chair-stuff, to be scraped and finished, on being laid on the guide E, will be pushed forward thereon by the driver G during its advance, and will be forced between and against the two scrapers, which will simultaneously act on the opposite surfaces or sides of such piece. The forward movement of the driver will be caused by the rope k1 being wound on the drum I. Then the driver may have nearly attained its extreme advanced position its cam will so act against the shipper as to cause it to be moved in a manner to unclutch the drum I from the shaft K, in which case the spring H will be free to retract the driver on the guide E, which it Will do at once. Next, the attendant on the machine should place another piece of Wood or board on the guide and press his hip against the lever N, so as to cause the drum to be clutched to the driving-shaft. The driver Will next be again advanced and will force the second piece of Wood forward against the rst one, so'as to drive the latter still farther forward. Each piece so operated on and scraped will be tnally driven off the platform B.

The machine described in Letters Patent N o. 144,367 was invented by me, and had a stationary rest and a movable scraper-stock. The stuff while being scraped was stationary, and was reduced on one side only. I therefore herein make no claim to the machine so patented by me. With my presentmachine the stuff is reduced on two of its opposite sides simultaneously, andis moved along on a guide-board by means of the reciprocating driver, as described. Nor do I claim a single stationary surface and a movable carriage, or a stationary carriage and a movable surface, when employed to scrape but one side of a piece of board.

I claim- The combination, as well as the arrangement, of the guide E, the reciprocating driver G, the two Scrapers, and the mechanism for advancing and :receding the driver and clutching and unclutching its drum with respect to the driving-shaft, the whole being so as to operate as explained.

E. S. FRENCH.

Witnesses:

R. H. EDDY, E. P. HALE, Jr. 

